Journal of Supercritical Fluids最新文献_第9页

Supercritical CO2 effect on the physicochemical structure of coal and its adsorption capacity: Implications for CO2 geological sequestration 超临界CO2对煤的物理化学结构及其吸附能力的影响：对CO2地质封存的启示

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-06-06 DOI: 10.1016/j.supflu.2025.106684

Yuan Bao , Yarong Wang , Zhengyan Li , Jiahao Meng , Xiaojie Wu

{"title":"Supercritical CO2 effect on the physicochemical structure of coal and its adsorption capacity: Implications for CO2 geological sequestration","authors":"Yuan Bao , Yarong Wang , Zhengyan Li , Jiahao Meng , Xiaojie Wu","doi":"10.1016/j.supflu.2025.106684","DOIUrl":"10.1016/j.supflu.2025.106684","url":null,"abstract":"<div><div>The temperature and pressure conditions of coal seams at different burial depths influence the CO<sub>2</sub> storage potential. In this study, Fourier transform infrared spectroscopy, low-temperature nitrogen adsorption, low-field nuclear magnetic resonance, and isothermal CO<sub>2</sub> adsorption experiments were employed to investigate the changes in functional groups, pore structures, and carbon dioxide adsorption capacity of four coal samples with varying burial depths after supercritical carbon dioxide (ScCO<sub>2</sub>) treatment under simulated in-situ temperature and pressure conditions (8 MPa to 20 MPa, 35 °C to 65 °C). Results show that ScCO<sub>2</sub> treatment reduces the aromatic carbon content, aromatization, condensation degree of aromatic rings, aliphatic structure abundance, and the ratio of C<img>O/C<img>C in the coal samples. Additionally, ScCO<sub>2</sub> treatment induced increases in the pore structure of coal, promoting the transformation from micropores to mesopores. Following ScCO<sub>2</sub> treatment, the mesoporous volume of coal samples increased within the range of 2.22–41.38 %, whereas the specific surface area decreased between 9.40 % and 59.57 %. Moreover, the CO<sub>2</sub> adsorption volume exhibited an increase ranging from 3.81 cm³ /g to 6.92 cm³ /g. A positive correlation is observed between the enhancement in CO<sub>2</sub> adsorption capacity and both the increase in mesoporous volume as well as the decrease in C<img>O/C<img>C. Notably, the maximum adsorption capacity was attained at a depth of 1000 m, making it the optimal target for CO<sub>2</sub> injection. These findings provide theoretical guidance for selecting suitable burial depths for CO<sub>2</sub> storage in coal seams and elucidating the interaction mechanism between ScCO<sub>2</sub> and coal.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"225 ","pages":"Article 106684"},"PeriodicalIF":3.4,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144263021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Generation of liquid CO2 jets under atmospheric conditions for cutting applications 在大气条件下产生用于切割应用的液态CO2射流

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-06-06 DOI: 10.1016/j.supflu.2025.106688

Laura Göhlich, Stefan Pollak, Marcus Petermann

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Application of supercritical technology in the production of microparticles of bioactive compounds from apple pomace 超临界技术在苹果渣生产生物活性化合物微粒中的应用

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-06-06 DOI: 10.1016/j.supflu.2025.106685

Larissa Castro Ampese , Henrique Di Domenico Ziero , Iolanda De Marco , Mariarosa Scognamiglio , Stefania Mottola , Ernesto Reverchon , Tânia Forster-Carneiro

{"title":"Application of supercritical technology in the production of microparticles of bioactive compounds from apple pomace","authors":"Larissa Castro Ampese , Henrique Di Domenico Ziero , Iolanda De Marco , Mariarosa Scognamiglio , Stefania Mottola , Ernesto Reverchon , Tânia Forster-Carneiro","doi":"10.1016/j.supflu.2025.106685","DOIUrl":"10.1016/j.supflu.2025.106685","url":null,"abstract":"<div><div>The study's objective was to evaluate the efficiency of supercritical assisted atomization (SAA) technology in encapsulating bioactive compounds extracted from apple pomace (AP), a by-product of the juice industry. Supercritical assisted atomization (SAA) was performed with extract to polymer ratios (1:5, 1:10, and 1:20), encapsulation used polyvinylpyrrolidone (PVP), and a sugar-removal method was applied. The results indicate that the 1:10 ratio presented superior results, with an average particle size of 1.67 ± 1.25 µm and a dispersion index 2.25. The antioxidant capacity was 2.55 µmol of Trolox/g of AP, and the content of phenolic compounds reached 2.18 mg of gallic acid equivalent (GAE)/g of AP. Despite reducing the bioactive compounds after encapsulation, the stability was significantly improved: 92 % of the antioxidant capacity and 99 % of the phenolic compounds were preserved after two months of exposure to light, while the non-encapsulated extract retained only 66 % and 71 %, respectively. HPLC analysis identified gallic acid (91.16–128.13 ppm) and ascorbic acid (111.12–153.67 ppm) as the main compounds. The work also includes the feasibility of this route as a strategy for sustainable valorization of apple pomace using the Path2Green metric to evaluate the process from the perspective of green chemistry. The sustainability assessment using the Path2Green method generated a score of 0.524, indicating the sustainable feasibility of the process. Encapsulation aimed to protect bioactive compounds, such as phenolics and antioxidants, from degradation, increasing their stability and bioactivity for applications in the food, pharmaceutical, and cosmetic industries.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"225 ","pages":"Article 106685"},"PeriodicalIF":3.4,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144307836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Ultrasound-assisted subcritical water nanonization of quercetin 超声辅助下槲皮素亚临界水纳米化研究

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-06-05 DOI: 10.1016/j.supflu.2025.106683

Najmeh Youseftabar Miri, Mohammad H. Eikani, Nahid Khandan, Yasamin Bide

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Stability assessment of sulfided NiMo-based catalysts for continuous flow supercritical water hydrodeoxygenation applications 连续流超临界水加氢脱氧硫化镍基催化剂的稳定性评价

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-06-04 DOI: 10.1016/j.supflu.2025.106682

Alexey Kurlov , Luděk Meca , Tyko Viertiö , Sari Rautiainen , Frédéric Vogel , Juha Lehtonen , Pavel Kukula , David Baudouin

{"title":"Stability assessment of sulfided NiMo-based catalysts for continuous flow supercritical water hydrodeoxygenation applications","authors":"Alexey Kurlov , Luděk Meca , Tyko Viertiö , Sari Rautiainen , Frédéric Vogel , Juha Lehtonen , Pavel Kukula , David Baudouin","doi":"10.1016/j.supflu.2025.106682","DOIUrl":"10.1016/j.supflu.2025.106682","url":null,"abstract":"<div><div>Sulfided NiMo-based catalysts are widely used in hydroprocessing, including hydrotreating and hydrocracking in petroleum refining and renewable fuel production via biomass conversion. The development of hydrothermal liquefaction (HTL) for biocrude production has increased interest in direct hydrothermal upgrading processes, such as (hydro)deoxygenation and desulfurisation. This study evaluated the stability of NiMo- and NiW-based catalysts under continuous-flow conditions to assess their suitability for hydrothermal upgrading. After just 2 h in supercritical water (SCW), significant metal leaching was observed: Mo losses ranged from 47 % to 97 %, and Ni losses from 35 % to 80 %. Sulfidation provided only modest improvement, with losses still at 56–80 % for Mo and 52–75 % for Ni. Tungsten loss reached 90 % in the sulfided NiW catalyst. Mo leaching was particularly severe during the heating phase, with over 60 % of Mo and around 20 % of Ni lost during heating and cooling, peaking at 200 °C. At 400 °C, leaching rates from unreduced NiMo/AC were 0.4 mg h⁻¹ for Ni and 10 mg h⁻¹ for Mo. Sulfided NiMo showed better Mo stability, with leaching rates of 0.24 mg h⁻¹ for Ni and 3.6 mg h⁻¹ for Mo. These findings highlight the importance of assessing catalyst stability under realistic flow conditions. NiMo-, NiW-, and by extension, CoMo- and CoW-based catalysts are unsuitable for hydrothermal upgrading due to poor stability in SCW, particularly during heat-up and cool-down phases.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"225 ","pages":"Article 106682"},"PeriodicalIF":3.4,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144289153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Preparation of long-chain branched polyarylate foam with low dielectric and superior flame retardant performance by supercritical CO2 foaming 超临界CO2发泡制备低介电性能和阻燃性能的长链支化聚芳酯泡沫

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-06-04 DOI: 10.1016/j.supflu.2025.106681

Jiayang Sun , Wenyu Zhong , Yichong Chen , Jiabao Yu , Zhenhao Xi , Jinjin Li , Dongdong Hu , Bojiang Chen , Zhilu Shi , Ling Zhao

{"title":"Preparation of long-chain branched polyarylate foam with low dielectric and superior flame retardant performance by supercritical CO2 foaming","authors":"Jiayang Sun , Wenyu Zhong , Yichong Chen , Jiabao Yu , Zhenhao Xi , Jinjin Li , Dongdong Hu , Bojiang Chen , Zhilu Shi , Ling Zhao","doi":"10.1016/j.supflu.2025.106681","DOIUrl":"10.1016/j.supflu.2025.106681","url":null,"abstract":"<div><div>The rapid advancement of high-frequency, high-speed communication has increased the demand for electronic components with low dielectric properties and excellent stability. This study focuses on polyarylate (PAR), an engineering plastic, selected as a matrix material. To improve its properties, ADR, a long-chain branched modifier, was used to enhance rheological, mechanical, and foaming behavior. Supercritical CO<sub>2</sub> was employed as a foaming agent, producing long-chain branched PAR foams. The results showed significant improvements in foaming performance, with a foam density of 0.364 g/cm³ and small, well-arranged cells (10 μm). Characterization revealed that the foam possesses outstanding mechanical properties, excellent low dielectric loss (0.00217), low water absorption, and superior flame retardancy, making it a promising substrate material for high-frequency, high-speed communication applications.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"225 ","pages":"Article 106681"},"PeriodicalIF":3.4,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Mixtures of supercritical CO2 + (1‑octanol and/or n‑alkanes) at saturation: Density and viscosity measurements 饱和状态下的超临界CO2 +（1 -辛醇和/或正烷烃）混合物：密度和粘度测量

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-06-03 DOI: 10.1016/j.supflu.2025.106672

Omofolasewa H. Mukeba, Neo Motang, Cara E. Schwarz

{"title":"Mixtures of supercritical CO2 + (1‑octanol and/or n‑alkanes) at saturation: Density and viscosity measurements","authors":"Omofolasewa H. Mukeba, Neo Motang, Cara E. Schwarz","doi":"10.1016/j.supflu.2025.106672","DOIUrl":"10.1016/j.supflu.2025.106672","url":null,"abstract":"<div><div>Density and dynamic viscosity data were measured at phase transition for binary mixtures of CO<sub>2</sub> with 1-octanol, <em>n</em>-dodecane and <em>n</em>-tetradecane, and ternary mixtures of CO<sub>2</sub> with (1-octanol+<em>n</em>-dodecane), (1-octanol+<em>n</em>-tetradecane) and (<em>n</em>-dodecane+<em>n</em>-tetradecane). Data were measured at conditions between 308 and 348 K and up to 28 MPa and modelled using commercially available models in Aspen Plus® V11. A variable-volume high-pressure cell equipped with a torsional quartz crystal viscometer was used to detect the phase transition visually and non-visually. Densities were measured using the cell’s calibrated volume. The non-visual phase transition pressures compared well with the visual measurements (%AAD<sub>P</sub> <3 %). The density and viscosity data for the CO<sub>2</sub> +1-octanol exhibited an inversion, introducing a non-ideal, non-linear relationship between the physical properties and temperature. However, the addition of <em>n</em>-alkanes to the system removed these density and viscosity inversion effects. Further, the models poorly predicted the measured physical properties data, necessitating future improvements.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"225 ","pages":"Article 106672"},"PeriodicalIF":3.4,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144254757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Predicting self-diffusion coefficients of light gases in supercritical carbon dioxide: A molecular dynamics method 超临界二氧化碳中轻气体自扩散系数的分子动力学预测

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-05-31 DOI: 10.1016/j.supflu.2025.106664

Tongjia Zhang, Bowei Zhang, Jie Zhang, Xiaoran Rong, Hui Jin

{"title":"Predicting self-diffusion coefficients of light gases in supercritical carbon dioxide: A molecular dynamics method","authors":"Tongjia Zhang, Bowei Zhang, Jie Zhang, Xiaoran Rong, Hui Jin","doi":"10.1016/j.supflu.2025.106664","DOIUrl":"10.1016/j.supflu.2025.106664","url":null,"abstract":"<div><div>The methanation of CO<sub>2</sub> and supercritical CO<sub>2</sub> (scCO<sub>2</sub>) fracturing represent effective approaches for CO<sub>2</sub> utilization and greenhouse effect mitigation. In these process, light gases like H<sub>2</sub>, O<sub>2</sub>, CO, CH<sub>4</sub> are commonly involved. However, limited studies have focused on the diffusion behavior of these gases in scCO<sub>2</sub> under high-pressure conditions, as well as a shortage of self-diffusion coefficient data and prediction equations specifically designed for scCO<sub>2</sub> solvents. To address this gap, molecular dynamics (MD) simulations were employed to compute the self-diffusion coefficients of several light gases in scCO<sub>2</sub> across a wide temperature range (313 K–713 K) and at high pressures (75.994 bar, 101.325 bar and 126.656 bar) under infinitely dilute conditions. The effects of temperature, density, viscosity, molecular mass, and solute–solvent interaction energy on the self-diffusion behavior were systematically analyzed. Two empirical equations (a Speedy–Angell-type power-law equation and a newly developed equation incorporating temperature, density, and viscosity) were refitted based on simulation data. The overall relative errors are 4.52 % and 4.44 %, respectively, indicating an improved accuracy compared to conventional experimental and MD-based empirical equations.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"225 ","pages":"Article 106664"},"PeriodicalIF":3.4,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144202449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Modeling and simulation of supercritical CO2 flow in a heavy-duty centrifugal compressor: A design robustness assessment in the liquid-like region 重型离心式压缩机超临界CO2流动建模与仿真：类液区设计稳健性评估

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-05-29 DOI: 10.1016/j.supflu.2025.106671

Júlia Silva de Matos , Paulo Eduardo Batista de Mello , Fábio Saltara , Daniel Jonas Dezan , Leandro Oliveira Salviano , Jurandir Itizo Yanagihara

{"title":"Modeling and simulation of supercritical CO2 flow in a heavy-duty centrifugal compressor: A design robustness assessment in the liquid-like region","authors":"Júlia Silva de Matos , Paulo Eduardo Batista de Mello , Fábio Saltara , Daniel Jonas Dezan , Leandro Oliveira Salviano , Jurandir Itizo Yanagihara","doi":"10.1016/j.supflu.2025.106671","DOIUrl":"10.1016/j.supflu.2025.106671","url":null,"abstract":"<div><div>This study models and simulates supercritical CO<sub>2</sub> behavior on the fourth stage of an industrial-scale centrifugal compressor, operating near the critical point in the liquid-like region. Computational fluid dynamics (CFD) simulations assessed steady-state, three-dimensional turbulent flow with a domain comprising the inlet duct, impeller, and vaneless diffuser. The novelty of this work lies in evaluating the robustness of the rotor design under realistic operational conditions found in floating production storage and offloading (FPSO) units, through the application of a metastable thermodynamic model to capture property variations in the liquid-like region. A phase change and cavitation hypothesis are addressed. Entropy analysis showed most losses in the middle rotor passage. Key metrics like pressure ratio, isentropic efficiency, and input power were analyzed to enhance understanding of CO<sub>2</sub> behavior.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"225 ","pages":"Article 106671"},"PeriodicalIF":3.4,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144230940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic evolution of corrosion products and their influence on carbon steel corrosion in supercritical CO₂ 超临界CO 2中腐蚀产物的动态演化及其对碳钢腐蚀的影响

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-05-28 DOI: 10.1016/j.supflu.2025.106670

Chenhao Huang , Weizhi Zhang , Jing yan , Tan Gu , Hongyuan Fan , Lan Sun , Jun Wang

{"title":"Dynamic evolution of corrosion products and their influence on carbon steel corrosion in supercritical CO₂","authors":"Chenhao Huang , Weizhi Zhang , Jing yan , Tan Gu , Hongyuan Fan , Lan Sun , Jun Wang","doi":"10.1016/j.supflu.2025.106670","DOIUrl":"10.1016/j.supflu.2025.106670","url":null,"abstract":"<div><div>The successful implementation of carbon capture and storage depends on mitigating CO<sub>2</sub>-induced pipeline corrosion. This study simulates supercritical CO<sub>2</sub> corrosion of carbon steel under extreme saturated water conditions, comparing corrosion mechanisms in atmospheric, low, and supercritical CO<sub>2</sub> environments using weight loss and electrochemical methods. The results show that the corrosion rate in the supercritical environment is 0.396 ± 0.017 mm/y, which is much higher than that in the atmospheric environment (0.226 ± 0.011 mm/y) and slightly higher than that in the low pressure environment (0.317 ± 0.013 mm/y). However, the electrochemical impedance data show that the resistance of the corrosion product layer formed in the supercritical environment in the later stage of corrosion to electric charge is 2439.53 Ω·cm<sup>2</sup>, which is 5 times that in the low pressure environment and 31 times that in the atmospheric pressure environment. This shows that the supercritical corrosion product layer structure is denser and has a stronger protective effect on the carbon steel in the later stage of corrosion. The corrosion resistance in the supercritical CO<sub>2</sub> is controlled by the deposition of corrosion products, forming a double-layer structure. In-situ electrochemical data show that the resistance of the corrosion layer after corrosion for 192 h is 91 times that of corrosion for 6 h (26.66 Ω·cm<sup>2</sup>). Combined with TEM and other experiments, it is found that this is mainly due to the change of relative supersaturation driving the formation of amorphous and crystalline layers, which affects the overall corrosion protection of the material.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"224 ","pages":"Article 106670"},"PeriodicalIF":3.4,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144184527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0